Section 2. Assembly of Components and Erection of Tower
2-15
Failure to use or exchange the desiccant may lead to
condensation inside the enclosure. Not only will this lead to
corrupted data, but, in the long term, can also cause corrosion
which is expensive to repair.
If there will be an extended time between maintenance visits,
we strongly recommend that extra desiccant packs are
purchased and placed in the enclosure to ensure that it
remains moisture free
– see the Enclosures Installation.
2.10.2 Rust Prevention
Spray rustproofing compound over all bolts, joints and any exposed threads. Also
apply to any crevices where water may settle, especially around the eyebolts.
Exposed steel legs may be treated, but take care that any drainage channels from
the aluminium legs are not blocked.
This process must be repeated annually, if necessary repainting the steel base with
rust resistant paint.
Do not allow contact between rustproofing compound and the
datalogger or sensors. In particular, avoid spraying the com-
pound close to the humidity sensor.
Also ensure that water can drain effectively from the aluminium
tubing of the tower to prevent water traps and possible damage
from freezing. See Section 1.
2.10.3 Inspection
After a few days check that the tower is secure and level. Check the guy wires
(where fitted) and all bolts.
At least every year (and preferably every six months) check the tower, for tilting
and damage; check all guy wires (where fitted) and reapply rustproofing
compound as before, especially around the eyebolts.
The desiccant pack in the enclosure should be changed or dried out at an interval
which depends on how frequently the enclosure door is opened. Drying may be
done by placing in an oven at 120°C for 16 hours. In general the desiccant will last
as long as a set of alkaline batteries (4-6 months) if the door is opened for a few
minutes each week. More frequent inspections of the datalogger or operation in
very wet or humid conditions may require more frequent changing of desiccant. A
mineral desiccant is recommended and can be supplied upon request.
2.10.4 Sensors
Please refer to individual sensor manuals for maintenance and calibration
procedures.
High-Level Sensors
To thoroughly check and maintain sensors mounted at a high level, you will have
to tilt the tower to the ground to access the sensors. This is done as follows:
1.
Loosen the turnbuckle on the guy wire (where fitted) at the rear of the tower
(i.e. in the direction of tilt), and slip the guy wire from the anchor bolt.
2.
Remove
both
the bolts holding the rear leg into the base section.
CAUTION
CAUTION
